MESON Chess Problem Database

Problem Display
PID: 145930 (b1n2N2/r1P2p1r/1p1k3B/p3R3/4P2N/2Q5/1Kn1PqB1/2R5 w - - 0 1)

Spencer Palmer, RL

Chess, 1955

b1n2N2/r1P2p1r/1p1k3B/p3R3/4P2N/2Q5/1Kn1PqB1/2R5

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sf5#
    • 1...Qg1
      • 2.Sf5#
    • 1...Qe3
      • 2.Sf5#
    • 1...Qg3
      • 2.Sf5#
    • 1...Qxe2
      • 2.Sf5#
    • 1...Qxg2
      • 2.Sf5#
    • 1...Qf5
      • 2.Sxf5#
    • 1...f5
      • 2.Re6#
    • 1...f6
      • 2.Re6#
  • Tries
    • 1.Rd5+?
      • 1...Ke7
        • 2.Qe5#
      • 1...Bxd5!
  • Keys
    • 1.Re7!
      • threat
        • 2.Rd7#
      • 1...Kxe7
        • 2.Qe5#
      • 1...Rxc7
        • 2.Qxc7#
      • 1...Sxe7
        • 2.e5#
      • 1...Qc5
        • 2.Qf6#
      • 1...Qd4
        • 2.Sf5#
      • 1...Qf5
        • 2.Sxf5#
      • 1...Bc6
        • 2.Qe5#
      • 1...Sd4
        • 2.Qa3#
      • 1...f5
        • 2.Re6#
      • 1...f6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::S(G)
    • Q(b);N_GUARD,XP(C)::S(G)
    • Q(b);N_GUARD,XB(D)::S(G)
    • Q(b);N_GUARD::S(G),XQ(b)
    • P(g);N_GUARD::R1(H)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR2(E)
      • Refutation
        • B(i);XR(H)
  • Actual
    • R(H);
    • Threat
      • R1(H)
    • Vars
      • K(e);S_FLIGHT,XR(H)::QAR2(E)
      • R(f);OGATE,XP(J)::QAB1(E),XR(f)
      • S(j);SBLOCK,XR(H)::P(F)
      • Q(b);N_GUARD,SBLOCK::QAR2(E)
      • Q(b);N_GUARD,P_PINQ(E)::S(G)
      • Q(b);N_GUARD::S(G),XQ(b)
      • B(i);SBLOCK::QAB1(E)
      • S(a);N_GUARD,P_PINP(C),S_CUTQ(b)::QAB(E)
      • P(g);N_GUARD::R1(H)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).